This is the chatbot's description of concentric speaker design :
a concentric speaker design refers to a speaker driver where the voice coil and the magnet are concentrically aligned. And it's usually used in a single driver speaker, where the high, mid, and low frequencies are reproduced by the same driver but at different sections of the diaphragm.
I would love to see a one of their drivers cut in half . My 2000 has upped my quality of life considerably so i suspect i'll update my amp way before a new speaker.